feat: add Help class

dzgui/views/pages/help.py

@@ -0,0 +1,21 @@
+from typing import TYPE_CHECKING
+from dzgui.views.trees.tree_menu import MenuTreeView
+
+import gi
+gi.require_version("Gtk", "3.0")
+from gi.repository import Gtk  # noqa E402
+
+if TYPE_CHECKING:
+    from dzgui.controllers.mc import Controller
+
+class Help(Gtk.ScrolledWindow):
+    def __init__(self, controller: "Controller") -> None:
+        super().__init__()
+        self.treeview = MenuTreeView(controller)
+        self.add(self.treeview)
+
+        self.controller = controller
+        self.controller.register_widget("menu", self.treeview)
+
+    def get_treeview(self) -> MenuTreeView:
+        return self.treeview